Feeling our kids feelings

I have trouble with feeling my kids feelings. Now with "normal" kids this hasn't been such a big deal. Most of the time they feel pretty good. When they have a down day I feel a little down but try to help them if I can. RAD feelings are different because they are so out of proportionately big. When A was feeling anger it was OK because I would sometimes feel it but mostly realized how it was really not what the issue was. Now he is moving into sadness. Oh me Oh my. I am battling this. I see the sadness in his eyes. Here it in his voice. I can tell in his constant load of body aches and pains. And I have to be very careful not to sink into it. This is a time which could last quite awhile as we deal with it. I am going to have to constantly remind myself to pull back from his sadness and look at him from a little further back. Motherhood is not for sissies.